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Entropy generation in a high temperature superconducting current lead

โœ Scribed by D.P. Sekulic; Z. Uzelac; F.J. Edeskuty

Publisher
Elsevier Science
Year
1992
Tongue
English
Weight
757 KB
Volume
32
Category
Article
ISSN
0011-2275

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โœฆ Synopsis

The minimization of entropy generation has been used as a convenient thermal design tool in predicting the optimal temperature distribution in a cryogenic current lead. A vapourcooled lead with non-ideal cooling has been modelled by a set of non-linear differential equations with corresponding boundary conditions. Highly non-linear temperature dependent thermophysical properties, typical for a high temperature superconducting YBCO compound, have been incorporated in a current lead model. Numerically obtained current lead temperature profiles have been used to calculate entropy generation within the lead as a function of the relevant physical and operational parameters. It has been shown that with respect to thermodynamic irreversibility as an objective function, in both resistive and superconducting modes of operation, there is an optimal thermal design.

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